#include <bits/stdc++.h>
//#include <ext/pb_ds/assoc_container.hpp> // Common file
//#include <ext/pb_ds/tree_policy.hpp> // Including seg_tree_order_statistics_node_update
#include <stdio.h>
#include <cassert>
using namespace std;
//using namespace __gnu_pbds;
typedef long long  lo;
typedef long double ld;
typedef pair<lo,lo> ll;//pair
typedef vector<lo> vl;  //vector of long
typedef vector<ll > vll;   //vector of pair
typedef priority_queue<lo>p_q;
typedef vector< vl > vvl;  //vector of vectors
#define X first
#define Y second
#define mp(a,b) make_pair((a),(b))
#define REP(a,b) for(lo i=(a);i<(lo)b;i++)//no need to declare variable i
#define REPE(a,b,c,d) REP(a,b)for(lo j=(c);j<(lo)d;j++)//no need to declare vaiables i,j
#define REPV(a,b,c) for(lo(a)=b;(a)<(c);(a)++)//a is the variable
#define IREP(a,b) for(lo i=(a);i>=(b);i--)
#define IREPV(a,b,c) for(lo(a)=b;(a)>=(c);(a)--)
#define all(v) (v).begin(),(v).end()
#define TRV(a) for(auto &it : a)
#define INF 55
#define MOD 1000000007
#define M 1000000007
#define BLOCK 300
#define CHECK_BIT(var,pos) ((var) & (1<<(pos)))
#define pb(a) push_back((a))
#define eps 1e-8
#define PI 3.141592653589793
#define debug(x) cout<<#x<<"="<<x<<endl
#define debug2(x,y) cout<<#x<<"="<<x<<" "<<#y<<"="<<y<<endl;
#define debug3(x,y,z) cout<<#x<<"="<<x<<" "<<#y<<"="<<y<<" "<<#z<<"="<<z<<endl;
#define debug4(x,y,z,w) cout<<#x<<"="<<x<<" "<<#y<<"="<<y<<" "<<#z<<"="<<z<<" "<<#w<<"="<<w<<endl;
#define debug5(x,y,z,w,t) cout<<#x<<"="<<x <<" ";debug4(y,z,w,t);
#define debug6(p,x,y,z,w,t) cout<<#p<<" "<<p<<" "<<#x<<"="<<x <<" ";debug4(y,z,w,t);
#define debug7(o,p,x,y,z,w,t) cout<<#o<<" "<<o<<" ";debug6(p,x,y,z,w,t);
#define print_matrix(a,n,m) REPE(0,n,0,m){cout<<(a)[i][j]<<((j==m-1)?'\n':' ');}
#define endl "\n"
template<typename T> ostream& operator<< ( ostream &o,vector<T> v ) {
    if ( v.size() >0 )o<<v[0];
    for ( unsigned   i=1; i<v.size(); i++ )o<<" "<<v[i];
    return o<<endl;
}
template<typename U,typename V> ostream& operator<< ( ostream &o,pair<U,V> p ) {
    return o<<"("<<p.first<<", "<<p.second<<") ";
}
template<typename T> istream& operator>> ( istream &in,vector<T> &v ) {
    for ( unsigned   i=0; i<v.size(); i++ )in>>v[i];
    return in;
}
template<typename T> istream& operator>> ( istream &in,pair <T,T> &p ) {
    in>>p.X;
    in>>p.Y;
    return in;
}
int main(){
    std::ios::sync_with_stdio(false);
	//cin.tie(0);cout.tie(0);cout.precision(20);
    string a;
    string b="!@#$%^&*()-+";
    bool dig=false,lc=false,uc=false,sc=false;
    lo len,ans=0;
    cin>>len>>a;
    REP(0,a.length()){
        if(a[i]<='z' and a[i]>='a')lc=true;
        else if(a[i]<='Z' and a[i]>='A')uc=true;
        else if(a[i]<='9' and a[i]>='0')dig=true;
        else REPV(j,0,b.length())if(a[i]==b[j])sc=true;
    }
    if(!lc)ans++,len++;
    if(!uc)ans++,len++;
    if(!dig)ans++,len++;
    if(!sc)ans++,len++;
    ans+=max(lo(0),6-len);
    cout<<ans;//<<Endl;
	return 0;
}